TPS60400-Q1 - 60mA Charge Pump Inverter | TI Automotive
MPN: TPS60400-Q1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.25 | $1.25 |
| 10 | $1.12 | $11.20 |
| 100 | $0.95 | $95.00 |
| 500 | $0.82 | $410.00 |
| 1,000 | $0.74 | $740.00 |
TPS60400-Q1 Overview
A charge pump voltage inverter is a type of DC-DC converter that uses switched capacitors to invert the polarity of an input voltage. Unlike inductive-based converters, charge pumps do not require inductors, which reduces electromagnetic interference (EMI) and simplifies PCB layout. The TPS60400-Q1 belongs to the TPS6040x-Q1 family of charge pump inverters, which are part of the broader category of switching regulators and power management ICs. These devices are essential in systems where a negative supply is needed for analog circuits, such as operational amplifiers, comparators, and data converters.
Key features of the TPS60400-Q1 include its wide input voltage range of 1.8 V to 5.25 V, 60 mA output current capability, and low quiescent current due to variable frequency operation. The device operates with a switching frequency that adjusts based on load, optimizing efficiency across the load range. It also features a shutdown mode to reduce power consumption when the output is not needed. The TPS60400-Q1 is available in the small SOT-23 (DBV) package, which is ideal for space-constrained automotive and portable applications.
Technically, the TPS60400-Q1 uses a charge pump architecture with an internal oscillator and switching transistors. The variable frequency control reduces switching losses at light loads, improving efficiency. The device can also be configured to generate a doubled positive output (2Vin) or a divided output (Vin/2) by connecting the capacitors differently, providing flexibility in system design. The output is unregulated, so the output voltage tracks the input voltage minus a small drop, which is acceptable for many analog applications.
Typical applications include generating a negative rail for operational amplifiers in automotive sensor interfaces, powering LCD bias circuits, and providing a negative supply for audio amplifiers and data converters. The TPS60400-Q1 is also used in battery-powered devices where a negative voltage is required for analog circuitry. Its small footprint and minimal external components make it an attractive choice for compact designs.
When designing with the TPS60400-Q1, it is important to place the three 1-µF ceramic capacitors close to the device to minimize parasitic inductance and ensure stable operation. The input capacitor should be placed between the IN pin and ground, and the output capacitor between the OUT pin and ground. The flying capacitor connects between the C1+ and C1- pins. Proper layout is critical to achieve the specified output ripple and efficiency.
Drop-in alternatives for TPS60400-Q1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS60403-Q1
✅ Drop-In📋 Reference alternative (not in catalog)
TPS60401-Q1
✅ Drop-In📋 Reference alternative (not in catalog)
TPS60402-Q1
✅ Drop-In📋 Reference alternative (not in catalog)
NCP1729
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LM27761
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS60400-Q1 Maximum Ratings & Electrical Characteristics
| Function | Charge Pump Voltage Inverter |
| Input Voltage Range | 1.8 V to 5.25 V |
| Output Current | 60 mA |
| Output Voltage | -Vin (unregulated) |
| Switching Frequency | Variable (up to 250 kHz) |
| Package | SOT-23 (DBV) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40°C to +125°C |
| AEC-Q100 Qualified | Yes |
| External Capacitors | Three 1-µF ceramic |
| Shutdown Mode | Yes |
| RoHS Status | Compliant |
TPS60400-Q1 Pin Configuration
| Pin 1 | IN — Input supply voltage |
| Pin 2 | GND — Ground |
| Pin 3 | EN — Enable (active high) |
| Pin 4 | C1- — Flying capacitor negative terminal |
| Pin 5 | C1+ — Flying capacitor positive terminal |
| Pin 6 | OUT — Negative output voltage |
Typical Applications
TPS60400-Q1 is suitable for 6 applications: Automotive Sensor Interface, LCD Bias Supply, Audio Amplifier Negative Supply, Data Converter Power Supply, Battery-Powered Portable Device, Industrial Control System.
Automotive Sensor Interface
The TPS60400-Q1 generates a negative supply rail for operational amplifiers in automotive sensor interfaces. Its AEC-Q100 qualification ensures reliable operation in harsh environments, and the variable switching frequency reduces power consumption over a wide load range. The small SOT-23 package and minimal external components (three 1-µF capacitors) save board space in space-constrained ECU designs. The device operates from a 1.8 V to 5.25 V input, making it compatible with common automotive supply rails. The unregulated output is acceptable for op-amp biasing, where the negative rail is used for signal conditioning. The low quiescent current due to variable frequency operation helps extend battery life in always-on automotive systems.
Recommended
LCD Bias Supply
The TPS60400-Q1 provides a negative bias voltage for LCD displays in automotive and portable devices. The device generates a negative output from a positive input, eliminating the need for an inductive converter. Its variable switching frequency reduces EMI, which is critical for display signal integrity. The three 1-µF ceramic capacitors are small and cost-effective, fitting into thin display modules. The output current of 60 mA is sufficient for typical LCD bias requirements. The AEC-Q100 qualification makes it suitable for automotive infotainment displays. The shutdown mode allows power saving when the display is off, extending battery life in portable devices.
Recommended
Audio Amplifier Negative Supply
The TPS60400-Q1 generates a negative supply rail for audio amplifiers, enabling single-supply operation with a virtual ground. Its low noise and variable frequency operation minimize audio interference. The device requires only three 1-µF capacitors, simplifying the audio circuit layout. The 60 mA output current is adequate for small audio amplifiers and headphone drivers. The SOT-23 package is compact, fitting into portable audio devices. The wide input range allows operation from a 3.3 V or 5 V supply. The shutdown mode reduces power consumption when audio is not in use, extending battery life in portable speakers.
Recommended
Data Converter Power Supply
The TPS60400-Q1 provides a negative supply for data converters (ADCs/DACs) that require bipolar operation. The device generates a negative rail from a positive supply, eliminating the need for a separate negative supply generator. Its low EMI and small footprint are beneficial for precision analog designs. The 60 mA output current is sufficient for most data converter reference circuits. The variable frequency operation reduces power consumption at light loads, which is common in battery-powered instrumentation. The AEC-Q100 qualification ensures reliability in automotive data acquisition systems. The three 1-µF capacitors are easy to source and place close to the converter for optimal performance.
Recommended
Battery-Powered Portable Device
The TPS60400-Q1 is ideal for battery-powered devices that need a negative supply for analog circuitry. Its low quiescent current due to variable frequency operation extends battery life. The device operates from a 1.8 V to 5.25 V input, compatible with single-cell Li-ion or two-cell alkaline batteries. The small SOT-23 package and minimal external components save space in compact designs. The shutdown mode allows power gating when the negative rail is not needed. The unregulated output is acceptable for many analog applications, such as op-amp biasing and sensor excitation. The device's low EMI is beneficial for portable devices with sensitive RF circuits.
Recommended
Industrial Control System
The TPS60400-Q1 generates a negative supply for industrial control systems, such as PLCs and process controllers. Its wide input range and AEC-Q100 qualification (though primarily automotive, it is also suitable for industrial) ensure robust operation in harsh environments. The variable frequency operation reduces power consumption in systems with varying loads. The device's small footprint and minimal external components simplify PCB design in space-constrained control modules. The 60 mA output current is sufficient for op-amp and comparator circuits used in signal conditioning. The shutdown mode allows power saving during standby. The low EMI is beneficial for industrial environments with electromagnetic interference.
Recommended
Recommended Products Summary
Engineering reference data for TPS60400-Q1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS60403-Q1 | TPS60401-Q1 | NCP1729 |
|---|---|---|---|---|
| Package | SOT-23 (DBV) | SOT-23 (DBV) | SOT-23 (DBV) | SOT-23-5 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | onsemi |
Key Differentiators
- Variable switching frequency reduces quiescent current (vs TPS60403-Q1)
- AEC-Q100 qualified for automotive (vs NCP1729)
- Requires only three 1-µF capacitors (vs LM27761)
Design Notes
Place the three 1-µF ceramic capacitors as close to the TPS60400-Q1 as possible. The input capacitor should be between the IN pin and ground, the output capacitor between OUT and ground, and the flying capacitor between C1+ and C1-. Minimize trace lengths to reduce parasitic inductance and ensure stable operation. Refer to the TI datasheet SGLS246B for recommended layout guidelines.
The TPS60400-Q1 is an unregulated charge pump, so the output voltage tracks the input voltage minus a small drop. Ensure the input voltage is within the specified 1.8 V to 5.25 V range. The output current is limited to 60 mA; for higher currents, consider a different device. The variable switching frequency reduces quiescent current at light loads, improving efficiency.
Do not exceed the maximum input voltage of 5.25 V. Ensure the enable pin is properly driven; floating the enable pin may cause unpredictable operation. Use ceramic capacitors with adequate voltage rating and low ESR. Avoid using electrolytic capacitors, as they may not perform well at the switching frequencies. Verify the output ripple is acceptable for your application.
Compliance Information
AEC-Q100 qualified per TI product page. RoHS compliant per TI datasheet.
